I took some time to play back the past and see what COULD have happened if we kept Cousins and ended up signing him to an extension.
If we kept pace with our record at the time we traded Cousins, we would have received the 10th pick (if the lottery didn't get crazy). Considering Fox would not have dropped this far and the fact that we have Bogdanovic, Richardson, Labissiere, Cauley-Stein, Papagiannis, & Cousins as the core, we probably would have been looking at guys like Monk or Mitchell. For this example, let's say we drafted Mitchell (to really just show what our peak could have been) and then Mason in the 2nd round.
In free agency, let's say Collison, Gay, & McLemore walked and we retained Lawson (1 year deal w/ team option for the 2nd year) & Casspi (small 2-3 year deal) while still keeping Tolliver (was waived), Afflalo (was waived), & Barnes (was stretched) on the books. We would have had this roster going into the year:
PG - Mitchell / Mason / Lawson
SG - Bogdanovic / Richardson / Afflalo
SF - Casspi / Temple / Barnes
PF - Cauley-Stein / Tolliver / Labissiere
C - Cousins / Koufos / Papagiannis
Then next year, we would have the remaining players still under contract (if Temple & Koufos opted out and we resigned Cousins to the max):
PG - Mitchell / Mason
SG - Bogdanovic / Richardson
SF - Casspi
PF - Cauley-Stein / Labissiere
C - Cousins / Papagiannis
Depending on how we did that year, we could be in position to draft a guy like Mik. Bridges, Mil. Bridges, or Knox while still having about $40 mil in cap space during the 2018 offseason. Would a team that has Mitchell, Mason, Bogdanovic, Richardson, Mil. Bridges, Labissiere, Cauley-Stein, Papagiannis, & Cousins be more attractive to Paul George than the Lakers or Thunder? I would think so but that's just me

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At the end of the day we could have been looking at this team going into the 2018-19 season IF we kept Cousins and had some 20/20 hinsight:
PG - Mitchell / Mason
SG - Bogdanovic / Richardson
SF - George / Mil. Bridges / Casspi
PF - Cauley-Stein / Labissiere
C - Cousins / Papagiannis